1/*
2Copyright (c) 2012, Broadcom Europe Ltd
3All rights reserved.
4
5Redistribution and use in source and binary forms, with or without
6modification, are permitted provided that the following conditions are met:
7 * Redistributions of source code must retain the above copyright
8 notice, this list of conditions and the following disclaimer.
9 * Redistributions in binary form must reproduce the above copyright
10 notice, this list of conditions and the following disclaimer in the
11 documentation and/or other materials provided with the distribution.
12 * Neither the name of the copyright holder nor the
13 names of its contributors may be used to endorse or promote products
14 derived from this software without specific prior written permission.
15
16THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
17ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
20DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26*/
27
28
29/* ---- Include Files ---------------------------------------------------- */
30
31#include <stdio.h>
32#include <stdlib.h>
33#include <stdarg.h>
34#include <string.h>
35#include <time.h>
36
37#include "interface/vmcs_host/vc_vchi_gencmd.h"
38#include "interface/vmcs_host/vc_gencmd_defs.h"
39
40void show_usage()
41{
42 puts( "Usage: vcgencmd [-t] command" );
43 puts( "Send a command to the VideoCore and print the result.\n" );
44 puts( " -t Time how long the command takes to complete" );
45 puts( " -h, --help Show this information\n" );
46 puts( "Use the command 'vcgencmd commands' to get a list of available commands\n" );
47 puts( "Exit status:" );
48 puts( " 0 command completed successfully" );
49 puts( " -1 problem with VCHI" );
50 puts( " -2 VideoCore returned an error\n" );
51 puts( "For further documentation please see" );
52 puts( "https://www.raspberrypi.org/documentation/raspbian/applications/vcgencmd.md\n" );
53}
54
55int main( int argc, char **argv )
56{
57 VCHI_INSTANCE_T vchi_instance;
58 VCHI_CONNECTION_T *vchi_connection = NULL;
59
60 if ( argc == 1 )
61 {
62 // no arguments passed, so show basic usage
63 show_usage();
64 return 0;
65 }
66
67 vcos_init();
68
69 if ( vchi_initialise( &vchi_instance ) != 0)
70 {
71 fprintf( stderr, "VCHI initialization failed\n" );
72 return -1;
73 }
74
75 //create a vchi connection
76 if ( vchi_connect( NULL, 0, vchi_instance ) != 0)
77 {
78 fprintf( stderr, "VCHI connection failed\n" );
79 return -1;
80 }
81
82 vc_vchi_gencmd_init(vchi_instance, &vchi_connection, 1 );
83
84 if (argc > 1)
85 {
86 // first check if we were invoked with either -h or --help
87 // in which case show basic usage and exit
88 if( strcmp( argv[1], "-h" ) == 0 || strcmp( argv[1], "--help" ) == 0 )
89 {
90 show_usage();
91 return 0;
92 }
93
94 int i = 1;
95 char buffer[ GENCMDSERVICE_MSGFIFO_SIZE ];
96 size_t buffer_offset = 0;
97 clock_t before=0, after=0;
98 double time_diff;
99 uint32_t show_time = 0;
100 int ret;
101
102 //reset the string
103 buffer[0] = '\0';
104
105 //first, strip out a potential leading -t
106 if( strcmp( argv[1], "-t" ) == 0 )
107 {
108 show_time = 1;
109 i++;
110 }
111
112 for (; i <= argc-1; i++)
113 {
114 buffer_offset = vcos_safe_strcpy( buffer, argv[i], sizeof(buffer), buffer_offset );
115 buffer_offset = vcos_safe_strcpy( buffer, " ", sizeof(buffer), buffer_offset );
116 }
117
118 if( show_time )
119 before = clock();
120
121 //send the gencmd for the argument
122 if (( ret = vc_gencmd_send( "%s", buffer )) != 0 )
123 {
124 printf( "vc_gencmd_send returned %d\n", ret );
125 }
126
127 //get + print out the response!
128 if (( ret = vc_gencmd_read_response( buffer, sizeof( buffer ) )) != 0 )
129 {
130 printf( "vc_gencmd_read_response returned %d\n", ret );
131 }
132 buffer[ sizeof(buffer) - 1 ] = 0;
133
134 if( show_time )
135 {
136 after = clock();
137 time_diff = ((double) (after - before)) / CLOCKS_PER_SEC;
138 printf( "Time taken: %f seconds (%f msecs) (%f usecs)\n", time_diff, time_diff * 1000, time_diff * 1000000 );
139 }
140
141 if ( buffer[0] != '\0' )
142 {
143 if ( buffer[ strlen( buffer) - 1] == '\n' )
144 {
145 fputs( buffer, stdout );
146 }
147 else
148 {
149 if (strncmp( buffer, "error=", 6) == 0 )
150 {
151 fprintf (stderr, "%s\n", buffer);
152 if ( strcmp( buffer, "error=1 error_msg=\"Command not registered\"" ) == 0 )
153 {
154 fprintf( stderr, "Use 'vcgencmd commands' to get a list of commands\n" );
155 }
156 return -2;
157 }
158 else
159 {
160 puts(buffer);
161 }
162 }
163 }
164 }
165
166 vc_gencmd_stop();
167
168 //close the vchi connection
169 if ( vchi_disconnect( vchi_instance ) != 0)
170 {
171 fprintf( stderr, "VCHI disconnect failed\n" );
172 return -1;
173 }
174 return 0;
175}
176